Trigger mechanism



March 7, 1933- R. A. LESTER TRIGGER MECHANISM Original Filed Sept. 16, 1950 2 Sheets-Sheet l ltamey arch 7, 1933. R. A. LESTER v TRIGGER MECHANISM Original Filed Sept. 16, 1950 2 Sheets-Sheet 2 j two triggerrme'cha-nisms are' usually'used'.

Patented Mar. 7, 1933 =-I OYA. LESTER, orinn rnso, TEXAS jmaIeeEnMEoHAmsM This inventionrelates to certain new and useful improvements in fire arms having particular' reference to a double barrel shot gun.

,, A primary object of this invention is to "5 provide a triggermechanism for double-barrel shot; guns, the invention comprehending the provision of-a single trigger member for controlling the sea-rs 0f the conventional i mechanism of the shot; gun whereby the barrels may be discharged upon operation of a single trigger.

A still further-object of' the invention is to provide means whereby the barrels may be fired successively, or selectively,- as desired.

A' still further object of the invention is to provide a single trigger :mechan-ismthat can bez applied to, practically any double barrel shotgun, or any other type of fire-'arm where A still" further obj ect of the invention is to provideatrigger mechanism of; the above mentioned character which may be applied to the shot :gun with but little" material altera- I tions in the construction of theshot gun.

tion will becomeapparent during a study of the following description, taken in connection with the accompanying drawings wherein:

Figure 1 is afragmentary-side elevational' view of a portion of a gun equipped with my trigger mechanism, the gun being shown cocked, or'in a-condition'ready to fire,

Figure 2" is a similar view'lookingat the opposite sideof'the gun,

Figure 3 is a fragmentary side elevational View certain parts beingshown-in section for illustrating the locking mechanism; the same'being in-an inefi'ective position,

Figured is va fragmentary view partly in seotion and partly in' elevation showing the lockingmechanism in an effective position, Figure 5 is a top plan view of the. trigger mechanism per s'e, v V,

" Figure 6is a fragmentary verticalsectronal .Other'objects and advantages of the invens Application filedSeptmber'i,'1930,"Seria1 no. 4823381 Renewed January 14, 1933 view. taken substantiallyon the line "6 6 (if Figure 2and looking in the direction er the arrows. 1 "With reference more in detail to the draw- H a mgs, itwillbe seen that I have-shown frag- 56 mentarily a conventional type' of double barrel shot gun including the usual double barrel. structure 1, the breach 2, the breach lo'c'klever 3, stock frame 4, and trigger guard T.

designates a trigger that 'includes the U -shaped body portionG rotatableon a pivot bolt mounted between a pair of? spaced bearing lugs 8 arranged adjacent the forward -end of the gun body.- A- spring 9 is convoluted about said pivot-'bolt'7'and suit- 30 ably engages the trigger body 6 for yieldabiy retaining the latter in the position, for example, shown in "Fig.8. Rockably carried 7 by-theiU-shaped body- 6 is a transversepin 10 that has mtegralther'ewith a segmental 1 plate 11 which, atits' upper edge is. provided 'witha pair of spaced'notohes' 12' and 13 'respectively. I

The right and left sears of the gun,indicatedby'reference'charactersa aridbrespectively 'atthe free ends thereofi extend one toeachside o'f the trigger body 6 to'be engaged by the cam members letand '15 provided on'theends ofpin10. r When the gun has been cocked or"broken, and looking'first at Figure 1 of-the drawings,it will be seen that the; free end of the -searn. rest s'upon the cam 14, while reference being had to'Figure 2, of the draw= ings, thejfree'end of the searb' is normally go raised above and out of engagement with the caml5. I e 4 The aforementioned segment platefll' has connected thereto adj acentthe ar'cuate edge thereof one-end of a-spring 17" tha-tshasits relatively VI opposite endfconneotedto the trigger body 6-remote from the pivot 7 an intermediate'portion of the springl7 being convoluted I about the 3 pin 10. Cooperating with the segment plate-11 is a stop pin' er g f? rod 18 disposed laterally of the plate 11 and at its upper end bent laterally for engagement with the notches 12 and 13 of said plate.

From the description thus far, it will be apparent that in operation, with the parts shown in the positions suggested in Figures 1 to 3 inclusive, the gun is in a position ready for fire. To fire the gun, trigger 5 is pulled in the usual manner causing plate 11 to move upwardly whereupon the end 19 of the stop member 18 is received in the notch 13 of plate 11, plate 11 being thereby retained against rotative movement toward the right in Figures 1 and At the same time'this upward movement of the plate 11 and trigger body 6 will, through the medium of cam' 14- engaging sear a trip the sear for firing that barrel of the gun controlled by the sear a;

Upon release of trigger 5, the trigger returns to its normal position. During the return of the trigger to its normal position the plate 11 under action of spring 17 is rotated together with pin 10 relative to the trigger body so that notch 12 is below and in registry with the end19 of the stop 18, andat the same time rotation of the pin 10 will cause movement of the cam member 15 to engage the shoulder Z) onthe proximate end of the sear b. j

To discharge the second barrel of the gun, the trigger is again pulled causing the plate 11 and trigger body 6 to move upwardly and the notch 12 of the plate when the latter is in its uppermost position will engage the end 19 of the stop. This upward movement of the plate 11 carries with it the pin 10 and will cause a raising of the sear 6 through the medium of the cam 15 engaging shoulder Z) of the sear thus tripping the latter with the result that the second barrel of the gun will be fired in the usual manner. hen the pull of the finger on trigger 5 is released, and subsequent to the actuation of the sear Z), the trigger returning to its normal position willcarry with it segment 11 and at the same time spring 17 will exert a pull on the so}; ment plate 11 rotating the same in an anticlockwise direction whereupon the plate 11 is returned to its normal position or to the position shown in the drawings.

A safety lockfor the trigger comprises an upright 20 that is bifurcated adjacent its upper end. Pivoted intermediate its ends as at 21, is an angular locking lever that has one end 22 adapted to abut a squared edge 23 of plate 11; and a ball like end 24; receivable in a suitable socket 25 provided therefor in a slide 26. The slide 26 is operable within a slot 27 formed in the top of the free portion of the gun. The slide further includes a knurled finger or grip portion 28.

Vertically and, reciprocably arranged in the lower end portion of the standard or upright 20 is a spring pressed plunger 29 that has its upper oppositely beveled end adapted to engage an integral cam lug 30 formed on said angular lever adjacent its pivot 31.

In the operation of the lock structure just described, with the slide in the position suggested in Figure 4, the upper end of the plunger 29 engages the free end of lug 30, retaining the end portion 22 of the lever in engagement with edge 23 of plate lland above the rear end portion of the trigger body 6. Thus, the trigger 5 is therefore permitted to be rocked upwardly and forwardly or to the right of Figures, resulting only in cam 14 acting upon seara, which having just been fired, prevents the gun from doubling, that is to say that the rocking of the trigger, being limited by contact of the rear end of the body 6 with end 22 of the locking lever, will prevent effective contact with sear b.

The ineffective or non-locking position of the lever is such as suggested in Figure 3. In said figureslide 26 liasbeen moved toward the forward end of the slot 27 and the lever has been rocked so that end 22 thereof is out of the path of movement of trigger body 6. The upper end of the spring pressed plunger 29 is then received in the crotch between lug 30 and the adjacent end portion 22 of the lever, locking the latter in this'ineifective position, permitting free movement of the trigger and associated parts.

The slide 26 is operatively associated with other conventional parts of the gun structure. v

To make the trigger selective that is to enable one to fire the left barrel prior to firing the right barrel, I provide a second look for retaining the sear a against cocking. This second look comprises a slide 31 mounted in the bottom of breach portion 2 of the gun, for movement into and out of contact with an integral operating projection 32 on sear a. The slide 31 is equipped with a suitable knurled finger portion 33. In the operation of the second look the slide thereof is moved forwardly or to the right of Figure 1, to engage projection 32 of sear a as shown in Figurerl.

A leaf spring 34 suitably anchored at one end, has the free end thereof engageable with a lateral pin 35 carried by slide 31 for yieldably retaining the slide in contact with theprojection 32. Thus the slide 31 acts in 0pposition to the cocking mechanism (not shown) of the gun to hold the sear a, against being cocked when the gun is broke for the purpose of cooking the same, resulting only in the cocking of scar b.

lVith the gun so cocked only sear b will be effective for firing its particular barrel, that is the leftbarrel of the gun, and the firing action will be substantially the same as if sear a had been previously fired.

From the foregoing then it will be seen that I have provided a comparatively simple trigger mechanism for double barrel shot guns, and that the invention provides for successively firing the barrels or selectively firing the barrels as may be desired. Furthermore, in View of the two locking devices embodied in the invention, the possibility of accidental discharge of the gun is reduced to a minimum and that such locking mechanism provides for positively locking the trigger against casual movement resulting in a possible accidental discharge of the gun.

Even though I have herein shown and described the preferred embodiment of my invention, it is to be understood that the same is susceptible to changes fully comprehended by the spirit of the invention as herein described, and the scope of the appended claims. 1

Having thus described my invention, what I claim as new is:

1. A single trigger mechanism for double barrel firearms comprising in combination with hammer sears and a trigger, a rockable pin carried by the trigger and cams on the pin, one of which is normally engaged with the hammer sear to be tripped thereby and the other of which is normally disengaged with that hammer sear to be tripped thereby and adapted to move into engagement with its hammer sear subsequent to the tripping oi": the first named hammer sear.

2. A single trigger mechanism for double barrel firearms comprising in combination with hammer sears and a pivoted trigger,

a pin rockably mounted on the trigger, cam

members on the pin engageable with the hammer sears for successively tripping the latter, a notched segment on said pivot pin, a spring connected at its ends with said trigger and notched segment respectively and having an intermediate portion convolurted about said pivot pin, and a stop post laterally disposed with respect to said segment and having an upper end engageable with one of the notches of said segment when the trigger is pulled for firing purposes.

3. A single trigger mechanism for double barrel firearms comprising in combination .With hammer sears and a pivoted trigger, a pin rockably mounted on. the trigger, cam

members on the pin engageable with the hammer sears for successively tripping the latter, a notched segment on said pivot pin, a spring connected at its ends with said trigger and notched segment respectively and having an intermediate portion convoluted about said pivot pin, and a stop post laterally disposed with respect to said segment and having an upper end engageable with one of the notches of said segment when the trigger is pulled for firing purposes, locking means for looking the trigger against casual movement when the gun is in a firing condition, and means .engageable with one of said hammer sears for preventing tripping of the latter when tripped when the trigger is pulled. a

In testimony whereof I afiix my signature.

ROY A. LESTER. 

